Method DrawShape

blocks/Box2D/src/Box2D/Dynamics/b2World.cpp:1031–1092

}

void b2World::DrawShape(b2Fixture* fixture, const b2Transform& xf, const b2Color& color)
{
	switch (fixture->GetType())
	{
	case b2Shape::e_circle:
		{
			b2CircleShape* circle = (b2CircleShape*)fixture->GetShape();

			b2Vec2 center = b2Mul(xf, circle->m_p);
			float32 radius = circle->m_radius;
			b2Vec2 axis = b2Mul(xf.q, b2Vec2(1.0f, 0.0f));

			m_debugDraw->DrawSolidCircle(center, radius, axis, color);
		}
		break;

	case b2Shape::e_edge:
		{
			b2EdgeShape* edge = (b2EdgeShape*)fixture->GetShape();
			b2Vec2 v1 = b2Mul(xf, edge->m_vertex1);
			b2Vec2 v2 = b2Mul(xf, edge->m_vertex2);
			m_debugDraw->DrawSegment(v1, v2, color);
		}
		break;

	case b2Shape::e_chain:
		{
			b2ChainShape* chain = (b2ChainShape*)fixture->GetShape();
			int32 count = chain->m_count;
			const b2Vec2* vertices = chain->m_vertices;

			b2Vec2 v1 = b2Mul(xf, vertices[0]);
			for (int32 i = 1; i < count; ++i)
			{
				b2Vec2 v2 = b2Mul(xf, vertices[i]);
				m_debugDraw->DrawSegment(v1, v2, color);
				m_debugDraw->DrawCircle(v1, 0.05f, color);
				v1 = v2;
			}
		}
		break;

	case b2Shape::e_polygon:
		{
			b2PolygonShape* poly = (b2PolygonShape*)fixture->GetShape();
			int32 vertexCount = poly->m_vertexCount;
			b2Assert(vertexCount <= b2_maxPolygonVertices);
			b2Vec2 vertices[b2_maxPolygonVertices];

			for (int32 i = 0; i < vertexCount; ++i)
			{
				vertices[i] = b2Mul(xf, poly->m_vertices[i]);
			}

			m_debugDraw->DrawSolidPolygon(vertices, vertexCount, color);
		}
		break;